Gas-heater.



L. TA HAGAN.

GAS HEATER.r

APPLICATmH F1LED DEc.12.1914.

9245,904.. Patented Nov. 6, 1917.'

2 SHEETSSHEET l.

L. T. HAGAN.

GAS HEATER` APPLICATION FILED DEC. I2. I9I4.

' Patented Nov. 6, 1917.

2 SHEETS-SHEET 2.

Z yzweno Y v W Mmm ,..K I I asien.

LoUIs r. HAGAN, `or wrucnnsrnn, 'KEN'.LUCKTZ.y l

V,GAS-HEATER. Y

TOSaZZ whom z' may concern:

Be it known that I, LOUIS T. I-IAGAN, a citizen of the United States,residing yat Winchester, in thecounty of Clark and State of Kentucky,have invented new and useful Improvements in Gas-Heaters, of which thefollowing is a specification.

My present invention relates to improvements in gas heaters, and theprimary objects are to provide an improved heater of this characterwhich is capable of operating with relatively high efficiency totransmit heat therefrom to the air of a room or other chamber to beheated, the lheater being provided withmeans for insuring an efficientdraft therefor when rst started and when the heater is operated with arelativelylow flame.

To these and other ends, the invention consists in certain improvements,and combinations and arrangements of vparts,"all las will be hereinaftermore fully described, the plointed out particu` novel features beinglarly in thecl'aims at t cation.` l In the accompanying 'drawing:-Figure 1 is a front elevation, partly in section, of a gas heaterconstructed iny accordance with the present invention;

e end ofthe specifi- Fig. 2 represents a vertical section through theheater, as shown Fig.,.1, and looking toward the left; c y d Fig. 3shows one end of the 'heater as viewed from the rear;

Fig. 4 is a detail view showing'one of the return iiues in verticalsection; .j

Fig. 5 represents, on an enlarged scale, a section on the line 5-,5 VofFig. 4;

Fig. 6 is a top plan view of one of the flues; y

Fig. 7 represents a crossjsection through one of the flues on the line7-7 of Fig. il.

Similar parts are designated by the same reference characters in theseveral views.

The preferred construction is illustrated in the accompanying drawingand will be hereinafter described in detail. It is to be understood,however, that the invention is not restricted to the preciseconstruction shown, as equivalent constructions within the scope of theannexed claims may be used and will be covered thereby.

In the construction shown, the heater is of a type adapted to usenatural or other gas and is set into an ordinary open fireplace,

4Specification of Letters Patent. Application ered December-12,1914.serial No. 8:763954.

Patented Nev. e, 195i v.

1 designating the hearth, 9 the front wall of the chimney, 'the yrearwall of the chimneyor fire-place, and 4 the flue of the chimney. Theheater comprises an exterior' casing embodying a top wall 5, a rear wall6, which latter isxpreferably spaced a suitable distance in frontv ofthe wall 3, and Ventilating or'perforated plates 7 and 8. A burner orfire-back 9 is suitably fixed within the casing, preferably at a pointinfrear of the perforated Ventilating plates l7 vand 8, andthisburnerror fire-back can be of any suitable construction andappropriatel connectedv to a'isource of gasV4 supply. f n the presentinstance, the burner or fire-back 9 is supportedv at its rear end by aledgeI i 10 which extends rearwardly from the topy of the lowerperforated plate 8 and its upper end is supported by a rearwardextension `l1 of a cowl 12, the latter overhanging the com;

bustion chamber which is formed in frontof the Vburner'orl fire-back V9.

' According to the vpresent invention, yheat is' radiated n'otonlydirectlyfrom the flame produced gin front of the burner or fire-back 9,but is alsoradiated r from la suitable number of iiuesrthrough which theproducts of combustion from the burnery pass lon their way to thechimney, the'heat being absorbed from the4 flues by airwhich circulatespast them, such -air entering the casingthrough the lower perforatedpla-te`8 and iiowing into the roomv through the upper perforatedplate-7. In the construction shown, a number' of ilues having return bends are,arranged within the' casing of the heater and they serve asconduitsthrough'which the prod' ucts ofl combustion fromV the burner pass tothechimney. Preferably, each iiue is cornposed 'of a pair ofconcavedsheetjmetal-sections 13 and '14 which may be stampedV into`shape and united atv their marginal edgesVIV by seams 15 and 16. Eachflue ris formed with an inlet 17, a down bend 18, an up bend 19, and anexit 20, thel eXit of each iiue eX- tending through an opening 2l formedin the upper portion of the rear wall 6 of the heater, and the inlet end17 of each flue is secured or attached to the member 11. Each of thesereturn iiues offers a considerable surface to the air circulatingthrough the casing of the heater. In order to increase this radiatingsurface, a pair of fins 22 is preferably secured to the upper seam 16,and also a channeled plate 23, the flanges of which eXtend upwardly, issecured in position at the point where the inlet 17 of the fiue isconnected to the member 11. In the present instance, the channel-shapedmember 23 is formed with an opening through which the inlet end oftheflue passes, and after the flue is passed through the member 11, it maybe flanged, as at 24:. rIhe outlet or exit end 20 of each flue may besimilarly flanged, as at 25, to secure it to the rear wall 6 of thecasing.

The present invention provides simple and eiiicient means for insuringthe necessary draft for the burner when the same 1s first started andalso when the heater is operated with a relatively low iame. It consistsin providing a direct passage having a less capacity than that of thereturn bend flues for the flow of some of the products of combustion to'the chimney without requiring such products of combustion to flowthrough the return bends 18 and 19. This direct or by-passage 26 isalways open and it is preferablyv formed in each flue by concaving theflue sections 13 and 14k at the point between the inlet 17 and exit 20.In consequence, when the burner is first lighted, some of the heatedgases or products of combustion will enter the inlet 17 of each flue andwill then Vfiow directly through the bypass Q6 and to the chimney,thereby heating the air or gases in the chimney to a degree suflicientto induce a draft which will draw the major portion of the products ofcombustion through the return bends 18 and 19 of the flues. The sameaction occurs when the burner is operated witha relatively low flame,with the result that a positive circulation of the heated gases orproducts of combustion through the return bends 18 and 19 of the fluesis insured and the relatively large heating surfaces thus providedafford ample opportunity for the absorption of heat by the air whichenters the lower perforat-ed plate 8 and which discharges from thecasing through the upper perforated plate 7. It is to be understoodthat, in operating the heater at its normal capacity, only .a portion ofthe heated gases or products of combustion flow through the by-passage26, the major portion of the gases or products of combustion flowingthrough the returnbends of the iues.

I claim as my invention 1. In a heater of the class described, the

combination with a casing having a combustion chamber and an air inletat the bottom and an air outlet at the top thereof, of a row of iuesarranged in spaced relation within the casing and forming between themvertical air passages connecting the air inlet and outlet of the casing,each flue having return bends leading from the combustion chamber to thechimney exit and each iiue also having a by-passage of a capacity lessthan that of the return bends of the flue and leading directly from thecombustion chamber to the chimney exit, said return bends and thelay-passages of the flues forming communication at all times between thecombustion chamber and the chimney eXit.

2. In a heater of the character described,

a flue comprising a pair of complementalY necting them, and ccmplementalribs forni- K ing a dividing partition between said return bends, saidribs being shallower toward their upper ends to form a by-passagedirectly connecting said inlet and exit.

3. In a heater of the class described, the combination with a casingcontaining a combustion chamber and having an air inlet at the bottomand an air outlet at the top, of a row of upright laterally spaced fluesarranged within the casing and spaced laterally to provide upright airpassages connecting the air inlet and the air outlet of the casing, thepassages of the iiues being connected to receive the products ofcombustion from the combustion chamber, and heat radiating fins projecting laterally from the tops of the flues across the air passagesbetween the flues.

In testimony whereof I have hereunto set my hand in presencek of twosubscribing witnesses.

LUIS T. HAGAN.

Witnesses R. H. BRooKsHmR, L. D. BRANDENBERG.

Copies of this patent may be obtained for ve cents each, 'by addressingthe Commissioner 01E Patents,

Washington, D. C.

